diff mbox

[dpdk-dev] hash: fix library compilation for CPU with no SSE4.1

Message ID 1436964043-5729-3-git-send-email-pablo.de.lara.guarch@intel.com (mailing list archive)
State Superseded, archived
Headers

Commit Message

De Lara Guarch, Pablo July 15, 2015, 12:40 p.m. UTC 
  _mm_test_all_zeros is not available for CPUs with no SSE4.1,
therefore, DPDK would not build.
This patch adds an alternative for this, using _mm_cmpeq_epi32 and
_mm_movemask_epi8.

Fixes: 48a399119619 ("hash: replace with cuckoo hash implementation")

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
---
 lib/librte_hash/rte_cuckoo_hash.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox

Patch

diff --git a/lib/librte_hash/rte_cuckoo_hash.c b/lib/librte_hash/rte_cuckoo_hash.c
index 80cb126..0f33376 100644
--- a/lib/librte_hash/rte_cuckoo_hash.c
+++ b/lib/librte_hash/rte_cuckoo_hash.c
@@ -1128,9 +1128,15 @@  rte_hash_k16_cmp_eq(const void *key1, const void *key2, size_t key_len __rte_unu
 {
 	const __m128i k1 = _mm_loadu_si128((const __m128i *) key1);
 	const __m128i k2 = _mm_loadu_si128((const __m128i *) key2);
+#ifndef RTE_MACHINE_CPUFLAG_SSE4_1
 	const __m128i x = _mm_xor_si128(k1, k2);
 
 	return !_mm_test_all_zeros(x, x);
+#else
+	const __m128i x = _mm_cmpeq_epi32(k1, k2);
+
+	return (_mm_movemask_epi8(x) != 0xffff);
+#endif
 }
 
 static int